Load and demand calculators

Maximum demand, load schedules, demand factors, diversity factors, phase allocation, neutral-current and capacity worksheets for Australian installations.

14 calculators
Australian workflow
230/400 V a.c. context

CalculatorMaximum demand worksheetEstimate demand for a switchboard or load schedule using transparent entered factors.Inputs: Load groups, phase arrangement, entered demand factors, supply voltage.Output: Worksheet estimate requiring current Wiring Rules, authority and DNSP review.
CalculatorLoad schedule builder calculatorSummarise entered load rows into connected, duty-adjusted and phase totals.Inputs: Schedule reference, row currents, quantities, duty factors and phase allocation.Output: Load schedule worksheet with phase totals and review margin.
CalculatorSpare switchboard capacity calculatorCompare board capacity with existing demand, proposed load and future allowance.Inputs: Board capacity, existing demand, proposed load, future allowance and minimum spare target.Output: Capacity margin worksheet with remaining capacity and spare percentage.
CalculatorDemand factor worksheet calculatorApply user-entered demand factors to connected load groups.Inputs: Load group currents, demand factors and source notes.Output: Adjusted demand worksheet with effective factor and source review prompts.
CalculatorDiversity factor worksheet calculatorApply user-entered diversity factors to connected load groups.Inputs: Load group currents, diversity factors and source notes.Output: Diversified load worksheet with effective factor and source review prompts.
CalculatorNeutral current calculatorEstimate linear-load neutral current from entered L1, L2 and L3 current records.Inputs: Board reference, phase currents and neutral review limit.Output: Neutral-current worksheet with phase spread, neutral percentage and review margin.
CalculatorThree-phase load sharing calculatorDistribute entered single-phase rows across L1, L2 and L3 for load-schedule review.Inputs: Schedule reference, row currents, quantities, fixed phase labels and target spread.Output: Load-sharing worksheet with assigned phases, phase totals and spread margin.
CalculatorSupply capacity planning calculatorCompare entered available supply with present and future load allowances.Inputs: Available supply, existing demand, committed future load, planning allowance and reserve target.Output: Supply-capacity worksheet with remaining capacity, reserve percentage and reserve margin.
CalculatorStaged load addition calculatorTrack how proposed load stages affect cumulative demand and margin.Inputs: Base demand, capacity limit, review margin, stage loads and demand factors.Output: Staged-load worksheet with cumulative stage demand, final margin and trigger-stage prompt.
CalculatorCircuit load grouping calculatorGroup entered circuit rows by project label and phase.Inputs: Schedule reference, circuit rows, group labels, phase labels and review limit.Output: Grouping worksheet with largest group, phase totals and review-limit comparison.
CalculatorLoad list summary calculatorSummarise entered load rows into connected load and category totals.Inputs: List reference, row labels, quantities, unit loads and highlight threshold.Output: Load-list worksheet with connected load, category totals and largest rows.
CalculatorSwitchboard demand margin calculatorCompare board rating with calculated demand and future allowance.Inputs: Board reference, switchboard rating, calculated demand, future allowance and target margin.Output: Demand-margin worksheet with planned demand, used percent and margin comparison.
CalculatorSingle-phase load distribution calculatorSummarise single-phase circuits across L1, L2 and L3.Inputs: Schedule reference, circuit rows, phase labels, movable markers and target spread.Output: Distribution worksheet with phase totals, spread and move prompts.
CalculatorPhase balancing calculatorCompare entered L1, L2 and L3 load currents for phase-loading review.Inputs: Board reference, phase currents and review threshold.Output: Imbalance worksheet with highest/lowest phase, spread and neutral-current context.

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Calculation tools, structured tables, charts and guides for Australian electrical work using local terms, metric conductor sizes and 230/400 V, 50 Hz context.

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